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This study was conducted to examine the residual levels of lead (Pb) and cadmium (Cd) in Nile tilapia ( Oreochromis niloticus ) collected from three locations (Abbassa, Damietta, and El-Husseiniya) in Egypt. Moreover, the effects of these heavy metals on the antioxidant status in fish were also studied. A trial was conducted to establish some molecular biomarkers reflecting the adverse biological responses towards heavy metals exposure in Nile tilapia by following up changes in the mRNAdoi:10.1016/j.sciaf.2021.e00794 fatcat:754rlt62wfedxkys5psoav53h4